And a black suspender belt. You could even go so far as adding some blue heels, if you've got any. Because it's not solid blue it's really easy to wear/match with other items, colour pop is good!

Other than that, google. There's really not much point asking about where to find products not stocked here as we can't exactly link you! I'd love to see them sold here, but then I'm the type of person who wishes EVERYTHING was available in blue (and green) and I've figured over the years of watching and waiting that Lovehoney just don't quite think blue or green lingerie match their target market. If you're really wanting solid blue stockings now I wouldn't wait around for Lovehoney to stock them, though I've found loads of pairs through google that would match both the light blue Flirty pants linked above and the newer, darker shade of blue they come in so they're still a good starting point for a multi company set :)